「javaxssfrow」javaxssfrow导出换行
本篇文章给大家谈谈javaxssfrow，以及javaxssfrow导出换行对应的知识点，希望对各位有所帮助，不要忘了收藏本站喔。
本文目录一览：
- 1、java把HSSF全部替换成XSSF，然后来写excel2007报错?
- 2、java怎么读取excel数据
- 3、JAVA编程中用Apache POI 怎么用SXSSFWorkbook对已存在的excel（.xlsx）操作进行写数据操作
- 4、java poi根据列头解析excel
- 5、Java对Excel解析(求助)
- 6、java生成excel设置列宽，汉字问题
java把HSSF全部替换成XSSF，然后来写excel2007报错?
首先：确定jar包是否已经导入
需导入jxl.jar,poi-3.11-20141221.jar，commons-io-2.2.jar除外的jar包
其次看jdk版本是否大于1.6.0_18,若没有，则会在new XSSFWorkbook()时报错
java怎么读取excel数据
引入poi的jar包，大致如下：
读取代码如下，应该能看得明白吧
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.IOException;
import java.io.InputStream;
import java.math.BigDecimal;
import java.text.DecimalFormat;
import java.text.SimpleDateFormat;
import org.apache.poi.xssf.usermodel.XSSFCell;
import org.apache.poi.xssf.usermodel.XSSFRow;
import org.apache.poi.xssf.usermodel.XSSFSheet;
import org.apache.poi.xssf.usermodel.XSSFWorkbook;
public class ExcelUtil2007 {
/**读取excel文件流的指定索引的sheet
* @param inputStream excel文件流
* @param sheetIndex 要读取的sheet的索引
* @return
* @throws FileNotFoundException
* @throws IOException
*/
public static XSSFSheet readExcel(InputStream inputStream,int sheetIndex) throws FileNotFoundException, IOException
{
return readExcel(inputStream).getSheetAt(sheetIndex);
}
/**读取excel文件的指定索引的sheet
* @param filePath excel文件路径
* @param sheetIndex 要读取的sheet的索引
* @return
* @throws IOException
* @throws FileNotFoundException
*/
public static XSSFSheet readExcel(String filePath,int sheetIndex) throws FileNotFoundException, IOException
{
return readExcel(filePath).getSheetAt(sheetIndex);
}
/**读取excel文件的指定索引的sheet
* @param filePath excel文件路径
* @param sheetName 要读取的sheet的名称
* @return
* @throws IOException
* @throws FileNotFoundException
*/
public static XSSFSheet readExcel(String filePath,String sheetName) throws FileNotFoundException, IOException
{
return readExcel(filePath).getSheet(sheetName);
}
/**读取excel文件，返回XSSFWorkbook对象
* @param filePath excel文件路径
* @return
* @throws FileNotFoundException
* @throws IOException
*/
public static XSSFWorkbook readExcel(String filePath) throws FileNotFoundException, IOException
{
XSSFWorkbook wb=new XSSFWorkbook(new FileInputStream(filePath));
return wb;
}
/**读取excel文件流，返回XSSFWorkbook对象
* @param inputStream excel文件流
* @return
* @throws FileNotFoundException
* @throws IOException
*/
public static XSSFWorkbook readExcel(InputStream inputStream) throws FileNotFoundException, IOException
{
XSSFWorkbook wb=new XSSFWorkbook(inputStream);
return wb;
}
/***读取excel中指定的单元格，并返回字符串形式的值
* 1.数字
* 2.字符
* 3.公式（返回的为公式内容，非单元格的值）
* 4.空
* @param st 要读取的sheet对象
* @param rowIndex 行索引
* @param colIndex 列索引
* @param isDate 是否要取的是日期（是则返回yyyy-MM-dd格式的字符串）
* @return
*/
public static String getCellString(XSSFSheet st,int rowIndex,int colIndex,boolean isDate){
String s="";
XSSFRow row=st.getRow(rowIndex);
if(row == null) return "";
XSSFCell cell=row.getCell(colIndex);
if(cell == null) return "";
if (cell.getCellType() == 0) {//数字
if(isDate)s=new SimpleDateFormat("yyyy-MM-dd").format(cell.getDateCellValue());
else s = trimPointO(String.valueOf(getStringValue(cell)).trim());
}else if (cell.getCellType() == 1){//字符（excel中的空格，不是全角，也不是半角，不知道是神马,反正就是" "这个）
s=cell.getRichStringCellValue().getString().replaceAll(" ", " ").trim();
// s=cell.getStringCellValue();//07API新增，好像跟上一句一致
}
else if (cell.getCellType() == 2){//公式
s=cell.getCellFormula();
}
else if (cell.getCellType() == 3){//空
s="";
}
return s;
}
/**如果数字以 .0 结尾，则去掉.0
* @param s
* @return
*/
public static String trimPointO(String s) {
if (s.endsWith(".0"))
return s.substring(0, s.length() - 2);
else
return s;
}
/**处理科学计数法和百分比模式的数字单元格
* @param cell
* @return
*/
public static String getStringValue(XSSFCell cell) {
String sValue = null;
short dataFormat = cell.getCellStyle().getDataFormat();
double d = cell.getNumericCellValue();
BigDecimal b = new BigDecimal(Double.toString(d));
//百分比样式的
if (dataFormat == 0xa || dataFormat == 9) {
b=b.multiply(new BigDecimal(100));
//String temp=b.toPlainString();
DecimalFormat df=new DecimalFormat("0.00");//保留两位小数的百分比格式
sValue = df.format(b) + "%";
}else{
sValue = b.toPlainString();
}
return sValue;
}
}
JAVA编程中用Apache POI 怎么用SXSSFWorkbook对已存在的excel（.xlsx）操作进行写数据操作
XSSFWorkbook wb=new XSSFWorkbook(参数);中的参数是InputStream ，你直接XSSFWorkbook wb=new XSSFWorkbook(fs);就可以了。
第一步查询数据--这一步读者自行实现自己的数据查询 ListPointInfo points = null;
points = this.dao.getAllCollect(userId);
final MapString, ListPointInfo pointMap = new HashMap();
for (final PointInfo pointInfo : points) {
final String pt = pointInfo.getPointType(); if (pointMap.containsKey(pt)) {final ListPointInfo subList = pointMap.get(pt);
subList.add(pointInfo);
} else {final ListPointInfo subList = new ArrayList();subList.add(pointInfo);
pointMap.put(pt, subList
第二步：生成工作簿
final SXSSFWorkbook wb = new SXSSFWorkbook();
// 对每一种类型生成一个sheet
for (final Map.EntryString, ListPointInfo entry : pointMap.entrySet()) {
final ListPointInfo pts = entry.getValue();
// 获取每种类型的名字--作为sheet显示名称--如果不需要分sheet可忽略
String typeName = "";
if (this.dao.getTypeByTypeCode(pts.get(0).getPointType()) != null) {
typeName = this.dao.getTypeByTypeCode(pts.get(0).getPointType()).getPointTypeName();
}
final Sheet sheet = wb.createSheet(typeName);
//生成用于插入图片的容器--这个方法返回的类型在老api中不同
final Drawing patriarch = sheet.createDrawingPatriarch();
// 为sheet1生成第一行，用于放表头信息
final Row row = sheet.createRow(0);
// 第一行的第一个单元格的值
Cell cell = row.createCell((short) 0);
cell.setCellValue("详细地址");
cell = row.createCell((short) 1);
cell.setCellValue("经度");
cell = row.createCell((short) 2);
cell.setCellValue("纬度");
cell = row.createCell((short) 3);
for (int i = 0; i pts.size(); i++) {
final Row each = sheet.createRow(i + 1);
Cell infoCell = each.createCell((short) 0);
infoCell.setCellValue(pts.get(i).getAddrDetail());
infoCell = each.createCell((short) 1);
infoCell.setCellValue(pts.get(i).getX());
infoCell = each.createCell((short) 2);
infoCell.setCellValue(pts.get(i).getY());
infoCell = each.createCell((short) 3);
//查询获取图片路径信息--该步读者自定义
PointPic pic = this.dao.getPicInfoByPointId(pts.get(i).getId());
try {
if (pic != null) {
for (int k = 0; k 6; k++) {//因为有六张图片，所以循环6次
final short colNum = (short) (4+k);
infoCell = each.createCell(colNum);
BufferedImage img = null;
switch (k) {
case 0:
if (!StringUtils.isEmpty(pic.getPicOneAddr())) {
File imgFile = new File(pic.getPicOneAddr());
img = ImageIO.read(imgFile);
imgFile = null;
}
break;
case 1:
if (!StringUtils.isEmpty(pic.getPicTwoAddr())) {
File imgFile = new File(pic.getPicTwoAddr());
img = ImageIO.read(imgFile);
imgFile = null;
}
break;
case 2:
if (!StringUtils.isEmpty(pic.getPicThreeAddr())) {
File imgFile = new File(pic.getPicThreeAddr());
img = ImageIO.read(imgFile);
imgFile = null;
}
break;
case 3:
if (!StringUtils.isEmpty(pic.getPicFourAddr())) {
File imgFile = new File(pic.getPicFourAddr());
img = ImageIO.read(imgFile);
imgFile = null;
}
break;
case 4:
if (!StringUtils.isEmpty(pic.getPicFiveAddr())) {
File imgFile = new File(pic.getPicFiveAddr());
img = ImageIO.read(imgFile);
imgFile = null;
}
break;
case 5:
if (!StringUtils.isEmpty(pic.getPicSixAddr())) {
File imgFile = new File(pic.getPicSixAddr());
img = ImageIO.read(imgFile);
imgFile = null;
}
break;
}
ByteArrayOutputStream byteArrayOut = new ByteArrayOutputStream();
ImageIO.write(img, "jpg", byteArrayOut);
img = null;
//设置每张图片插入位置
final XSSFClientAnchor anchor = new XSSFClientAnchor(0, 0, 0, 0, colNum,
i + 1, (short) (colNum + 1), i + 2);//参数为图片插入在表格的坐标，可以自行查看api研究参数
anchor.setAnchorType(0);
// 插入图片
patriarch.createPicture(anchor, wb.addPicture(
byteArrayOut.toByteArray(), HSSFWorkbook.PICTURE_TYPE_JPEG));
byteArrayOut.close();
byteArrayOut = null;
}
pic = null;
}
} catch (final Exception e) {
e.printStackTrace();
}
}
}
final ByteArrayOutputStream os = new ByteArrayOutputStream();
try {
wb.write(os);
} catch (final IOException e) {
e.printStackTrace();
}
final byte[] content = os.toByteArray();
final String url = Var.BASE_URL+ File.separator + "output.xls";//读者自定义路径
final File file = new File(url);// Excel文件生成后存储的位置。
OutputStream fos = null;
try {
fos = new FileOutputStream(file);
fos.write(content);
os.close();
fos.close();
} catch (final Exception e) {
e.printStackTrace();
}
return url;//文件保存成功
java poi根据列头解析excel
这个需要你自己写方法. 遍历你的表头行每个单元格的数据
对比你传的参数 匹配时 返回 该单元格的列号. 然后再用不同的row去get得到的列号
Java对Excel解析(求助)
这篇blog主要是讲述java中poi读取excel，而excel的版本包括：2003-2007和2010两个版本， 即excel的后缀名为：xls和xlsx。
读取excel和MySQL相关： java的poi技术读取Excel数据到MySQL
代码如下
/**
*
*/
package com.b510.common;
/**
* @author Hongten
* @created 2014-5-21
*/
public class Common {
public static final String OFFICE_EXCEL_2003_POSTFIX = "xls";
public static final String OFFICE_EXCEL_2010_POSTFIX = "xlsx";
public static final String EMPTY = "";
public static final String POINT = ".";
public static final String LIB_PATH = "lib";
public static final String STUDENT_INFO_XLS_PATH = LIB_PATH + "/student_info" + POINT + OFFICE_EXCEL_2003_POSTFIX;
public static final String STUDENT_INFO_XLSX_PATH = LIB_PATH + "/student_info" + POINT + OFFICE_EXCEL_2010_POSTFIX;
public static final String NOT_EXCEL_FILE = " : Not the Excel file!";
public static final String PROCESSING = "Processing...";
}
/**
*
*/
package com.b510.excel;
import java.io.FileInputStream;
import java.io.IOException;
import java.io.InputStream;
import java.util.ArrayList;
import java.util.List;
import org.apache.poi.hssf.usermodel.HSSFCell;
import org.apache.poi.hssf.usermodel.HSSFRow;
import org.apache.poi.hssf.usermodel.HSSFSheet;
import org.apache.poi.hssf.usermodel.HSSFWorkbook;
import org.apache.poi.xssf.usermodel.XSSFCell;
import org.apache.poi.xssf.usermodel.XSSFRow;
import org.apache.poi.xssf.usermodel.XSSFSheet;
import org.apache.poi.xssf.usermodel.XSSFWorkbook;
import com.b510.common.Common;
import com.b510.excel.util.Util;
import com.b510.excel.vo.Student;
/**
* @author Hongten
* @created 2014-5-20
*/
public class ReadExcel {
/**
* read the Excel file
* @param path the path of the Excel file
* @return
* @throws IOException
*/
public ListStudent readExcel(String path) throws IOException {
if (path == null || Common.EMPTY.equals(path)) {
return null;
} else {
String postfix = Util.getPostfix(path);
if (!Common.EMPTY.equals(postfix)) {
if (Common.OFFICE_EXCEL_2003_POSTFIX.equals(postfix)) {
return readXls(path);
} else if (Common.OFFICE_EXCEL_2010_POSTFIX.equals(postfix)) {
return readXlsx(path);
}
} else {
System.out.println(path + Common.NOT_EXCEL_FILE);
}
}
return null;
}
/**
* Read the Excel 2010
* @param path the path of the excel file
* @return
* @throws IOException
*/
public ListStudent readXlsx(String path) throws IOException {
System.out.println(Common.PROCESSING + path);
InputStream is = new FileInputStream(path);
XSSFWorkbook xssfWorkbook = new XSSFWorkbook(is);
Student student = null;
ListStudent list = new ArrayListStudent();
// Read the Sheet
for (int numSheet = 0; numSheet xssfWorkbook.getNumberOfSheets(); numSheet++) {
XSSFSheet xssfSheet = xssfWorkbook.getSheetAt(numSheet);
if (xssfSheet == null) {
continue;
}
// Read the Row
for (int rowNum = 1; rowNum = xssfSheet.getLastRowNum(); rowNum++) {
XSSFRow xssfRow = xssfSheet.getRow(rowNum);
if (xssfRow != null) {
student = new Student();
XSSFCell no = xssfRow.getCell(0);
XSSFCell name = xssfRow.getCell(1);
XSSFCell age = xssfRow.getCell(2);
XSSFCell score = xssfRow.getCell(3);
student.setNo(getValue(no));
student.setName(getValue(name));
student.setAge(getValue(age));
student.setScore(Float.valueOf(getValue(score)));
list.add(student);
}
}
}
return list;
}
/**
* Read the Excel 2003-2007
* @param path the path of the Excel
* @return
* @throws IOException
*/
public ListStudent readXls(String path) throws IOException {
System.out.println(Common.PROCESSING + path);
InputStream is = new FileInputStream(path);
HSSFWorkbook hssfWorkbook = new HSSFWorkbook(is);
Student student = null;
ListStudent list = new ArrayListStudent();
// Read the Sheet
for (int numSheet = 0; numSheet hssfWorkbook.getNumberOfSheets(); numSheet++) {
HSSFSheet hssfSheet = hssfWorkbook.getSheetAt(numSheet);
if (hssfSheet == null) {
continue;
}
// Read the Row
for (int rowNum = 1; rowNum = hssfSheet.getLastRowNum(); rowNum++) {
HSSFRow hssfRow = hssfSheet.getRow(rowNum);
if (hssfRow != null) {
student = new Student();
HSSFCell no = hssfRow.getCell(0);
HSSFCell name = hssfRow.getCell(1);
HSSFCell age = hssfRow.getCell(2);
HSSFCell score = hssfRow.getCell(3);
student.setNo(getValue(no));
student.setName(getValue(name));
student.setAge(getValue(age));
student.setScore(Float.valueOf(getValue(score)));
list.add(student);
}
}
}
return list;
}
@SuppressWarnings("static-access")
private String getValue(XSSFCell xssfRow) {
if (xssfRow.getCellType() == xssfRow.CELL_TYPE_BOOLEAN) {
return String.valueOf(xssfRow.getBooleanCellValue());
} else if (xssfRow.getCellType() == xssfRow.CELL_TYPE_NUMERIC) {
return String.valueOf(xssfRow.getNumericCellValue());
} else {
return String.valueOf(xssfRow.getStringCellValue());
}
}
@SuppressWarnings("static-access")
private String getValue(HSSFCell hssfCell) {
if (hssfCell.getCellType() == hssfCell.CELL_TYPE_BOOLEAN) {
return String.valueOf(hssfCell.getBooleanCellValue());
} else if (hssfCell.getCellType() == hssfCell.CELL_TYPE_NUMERIC) {
return String.valueOf(hssfCell.getNumericCellValue());
} else {
return String.valueOf(hssfCell.getStringCellValue());
}
}
}
/**
*
*/
package com.b510.excel.client;
import java.io.IOException;
import java.util.List;
import com.b510.common.Common;
import com.b510.excel.ReadExcel;
import com.b510.excel.vo.Student;
/**
* @author Hongten
* @created 2014-5-21
*/
public class Client {
public static void main(String[] args) throws IOException {
String excel2003_2007 = Common.STUDENT_INFO_XLS_PATH;
String excel2010 = Common.STUDENT_INFO_XLSX_PATH;
// read the 2003-2007 excel
ListStudent list = new ReadExcel().readExcel(excel2003_2007);
if (list != null) {
for (Student student : list) {
System.out.println("No. : " + student.getNo() + ", name : " + student.getName() + ", age : " + student.getAge() + ", score : " + student.getScore());
}
}
System.out.println("======================================");
// read the 2010 excel
ListStudent list1 = new ReadExcel().readExcel(excel2010);
if (list1 != null) {
for (Student student : list1) {
System.out.println("No. : " + student.getNo() + ", name : " + student.getName() + ", age : " + student.getAge() + ", score : " + student.getScore());
}
}
}
}
/**
*
*/
package com.b510.excel.util;
import com.b510.common.Common;
/**
* @author Hongten
* @created 2014-5-21
*/
public class Util {
/**
* get postfix of the path
* @param path
* @return
*/
public static String getPostfix(String path) {
if (path == null || Common.EMPTY.equals(path.trim())) {
return Common.EMPTY;
}
if (path.contains(Common.POINT)) {
return path.substring(path.lastIndexOf(Common.POINT) + 1, path.length());
}
return Common.EMPTY;
}
}
/**
*
*/
package com.b510.excel.vo;
/**
* Student
*
* @author Hongten
* @created 2014-5-18
*/
public class Student {
/**
* id
*/
private Integer id;
/**
* 学号
*/
private String no;
/**
* 姓名
*/
private String name;
/**
* 学院
*/
private String age;
/**
* 成绩
*/
private float score;
public Integer getId() {
return id;
}
public void setId(Integer id) {
this.id = id;
}
public String getNo() {
return no;
}
public void setNo(String no) {
this.no = no;
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public String getAge() {
return age;
}
public void setAge(String age) {
this.age = age;
}
public float getScore() {
return score;
}
public void setScore(float score) {
this.score = score;
}
}
java生成excel设置列宽，汉字问题
貌似只能大概猜测。因为英文的字符不是等宽的，另外也和font-size, font-family有关。
如果是12号字体，一个汉字的宽度应该是12像素，一个字母应该大致是6像素。
你还需要将1像素转化为1excel单元格的宽度单位。
javaxssfrow的介绍就聊到这里吧，感谢你花时间阅读本站内容，更多关于javaxssfrow导出换行、javaxssfrow的信息别忘了在本站进行查找喔。
发布于：2022-12-22，除非注明，否则均为原创文章，转载请注明出处。